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Lesson 4 Polygons & Angles
Math 8 Mrs. Kisslinger
Math 8Essential Question: HOW can algebraic concepts be applied to geometry?
Material Needed Today:Glue Stick
Scissors
Study Guide
Workbook
Calculator
Pencil
POLYGON = a simple closed figure formed by 3 or more line segments (no curves)
REGULAR POLYGON = all sides & angles are equal
# of sides SHAPE # of triangles Sum of Angle Measures
triangle
quadrilateral
pentagon
hexagon
octagon
ANY Polygon Formula:"n" is the # of sides
Lesson 4 Polygons & Angles
Math 8 Mrs. Kisslinger
Paste your Shapes Chart into your Study Guide.
Workbook p. 398
Lesson 4 Polygons & Angles
Math 8 Mrs. Kisslinger
Now, let's find the measure of ONE interior angle ...
Use the same formula but when you are finished, divide by the number of sides
Workbook p. 399